1. BOLTED JOINT ASSEMBLY COMMON WIND TURBINE BOLTING APPLICATIONS
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
BOLTED JOINT ASSEMBLY COMMON WIND TURBINE BOLTING APPLICATIONS
This course is focused on the practical principles of assembly, not the design of bolted joints. It is targeted to field service technicians, supervisors, engineers and others who are responsible for quality in bolting and who need to acquire or refresh their knowledge of best practices so that they can better assess performance and achieve the results they seek.
A one-day course for mechanics is also available.

2. 1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
The following material is intended to make you aware of the commonly accepted and recognized principles and methods used in assembling bolted joints. However, every possible application of these methods cannot be foreseen and these general guidelines do not supersede any other applicable rules or regulations.
ALWAYS FOLLOW CURRENT COMPANY AND LOCAL SAFETY RULES AND PROCEDURES WHEN PERFORMING ANY OF THE WORK DESCRIBED IN THIS PRESENTATION.
Hytorc has no control over, and assumes no responsibility for any damage, injury or work interruptions due to any person’s use of, or reliance upon these generally accepted methods and principles.
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No course can cover all possibilities and address all problems. The key is to know what to look for, and where to go to get the answers.
Hopefully that is what you will take away from this course.

3. PRODUCTION APPLICATIONS
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
PRODUCTION APPLICATIONS
GEARBOX BEARINGS
GENERATOR COUPLING
MAIN BEARINGS
BLADE BEARINGS
BEDPLATE BOLTS
YAW BEARING

4. INSTALLATION APPLICATIONS
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
INSTALLATION APPLICATIONS
ROTOR TO MAIN SHAFT
BLADES TO HUB
TOWER TO NACELLLE
TOWER BOLTS

5. MAINTENANCE APPLICATIONS
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
MAINTENANCE APPLICATIONS
BEDPLATE BOLTS
GENERATOR COUPLING
GEARBOX BEARINGS
MAIN BEARINGS
YAW BEARING
BLADE BEARINGS
ROTOR TO MAIN SHAFT
TOWER TO NACELLLE
TOWER BOLTS
BLADES TO HUB

6. BRAKE CALIPER BOLTS STEALTH-2 MAKE UP TORQUE 530 FT.LBS.
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
BRAKE CALIPER BOLTS
36MM BOLT HEADS
STEALTH-2
MAKE UP TORQUE
530 FT.LBS.
GE-WIND PRODUCTION
TEHACHAPI, CALIFORNIA

7. YAW MOTOR ASSEMBLY HY-.7MXT 17MM ALLEN BOLTS 17MM DIRECT HEX DRIVE
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
YAW MOTOR ASSEMBLY
17MM ALLEN BOLTS
HY-.7MXT
17MM DIRECT HEX DRIVE
MAKE UP TORQUE
510 FT. LBS.

8. HUB BOLTS PUCK COVERS HY-3SA 50MM NUTS 60MM BOLT HEADS MAKE UP TORQUE
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
HUB BOLTS
HY-3SA 50MM NUTS
MAKE UP TORQUE
1400 FT. LBS.
PUCK COVERS
60MM BOLT HEADS
MAKE UP TORQUE
1550 FT. LBS.

9. BED PLATE BOLTS LOW CLEAR. 60MM LINK 60MM NUTS MAKE UP SPEC.
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
BED PLATE BOLTS
60MM NUTS
LOW CLEAR.
60MM LINK
MAKE UP SPEC.
270 DEGREE NUT TURN

10. MODEL 5 PEDESTAL BLOCK BOLTS 60MM BOLT HEADS MAKE UP TORQUE
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
60MM BOLT HEADS
MODEL 5
MAKE UP TORQUE
2080 FT. LBS.

11. Let’s Try A Few Questions To Ensure
1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
Let’s Try A Few Questions To Ensure
We Understand About Wind Applications And Loosening
Read the slide)
Please take a few minutes to complete exercise 1 and discuss it.
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(Quiz #2)

12. 1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
QUIZ
1. Proper bolting techniques are important during which phases of wind turbine work? A. Production B. Installation C. Maintenance D. All of these
2. Elastic interaction refers to the loosening of one bolt when others around it are tightened. How should this problem be addressed? ________________________________________
3. T / F There is no need to worry about tightening bolts in gradually increasing steps in wind turbines because what I do to one bolt has very little effect on the others?

13. 1 BOLTING ASSEMBLY TRAINING - INTRODUCTIONNotes from the Training Course on Bolting Assembly
QUIZ
4. T / F Shear loads try to move the two sides of a joint past one another, while axial loads try to separate or compress the joint?
5. It is rapidly vibrating shear loads that are most responsible for bolts coming loose. Wind turbines have many joints that are susceptible to this kind of vibration. The best thing I can do to avoid bolts coming loose is: A. Use loc-tite B. Tighten properly in the first place C. Use lock washers D. Avoid lubrication
6. T / F Each manufacturer has a specification document that tells me the appropriate torque values and bolting procedures for each critical joint in the tower and turbine?

14. Quiz answers:
D. All of these
Gradual incremental tightening and a check pass on all bolts
False. Most of the bolts are close enough to one another to have great effect on each other.
True
B. Tighten the bolts properly in the first place
True. Each manufacturer will have specific Bolt Torque Specifications and Work Instructions which must be followed)